#ifndef _GF_MATH_H_
#define _GF_MATH_H_

unsigned char gf_add(unsigned char a, unsigned char b);
unsigned char gf_sub(unsigned char a, unsigned char b);
unsigned char gf_mult(unsigned char a, unsigned char b);

unsigned char parity(unsigned char a, unsigned b);
char fc(unsigned char *sbox, unsigned char a, unsigned char b);

#endif
